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  1. To ground plane or not?
  2. 5Z4PA Alternative?
  3. Question about chassis ground
  4. 6337- wtf is it?
  5. need ideers for a 6 channel amp
  6. sv572 transformer headache
  7. 6C33C / 6EM7
  8. 6146 TUBES ?
  9. Impedance matching
  10. QRP03 - Tube Buffered Gainclone
  11. Amp Cage Fababricators?
  12. PP KT88, Need help!
  13. Question regarding rectifier tube replacement
  14. Harmon Kardon A500
  15. Double triode 6SN7
  16. Tank's DIY tube preamp
  17. C core OPT for PP EL84
  18. amp diagram for KT88 and 300B on the same circuit
  19. Yaqin MS 34 D
  20. Tube buffer for amplifier with LM1875
  21. What is the best ?
  22. DUKANE tube PA help
  23. Old tube? HELP RSE NP-7V-12 168810
  24. My first tube power amp
  25. Another mystery tube:
  26. Quad 22 Wiring
  27. Radford phase splitter again
  28. hookup wire source
  29. MCU adjustable fixed bias
  30. vr tube / glow tube as filter?
  31. Using phono stage only of preamp
  32. Decca Portable Record Player model DPS8 Filter cap replacment
  33. 6V6 vs EL84 for output
  34. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  35. 2A3 with 12AT7
  36. Voltage rating of plate gyrator MOSFET
  37. Quad22 like preamplifier kit
  38. Push-pull implemented with KT88
  39. My QUAD 2 Restoration
  40. DIY High Power Car Tube Amp
  41. Perished insulation on transformer secondary - seems shorted. What can I do here?
  42. Need advice and help with new build
  43. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  44. Determining imput impedence of a preamp line stage
  45. Newb question on 12AU7 gain stage
  46. Valve Preamplifier Help
  47. OPT choices - 6L6 PPP
  48. MESA STRATEGY 400
  49. Shuguang, Beijing or Shanghai EL84 ?
  50. CJ PV-5 tubes
  51. Reference tube amp kit, <20 watts for under $1,000?
  52. ccs power supply 310a
  53. At what point does it become a "hybrid" ?
  54. Line filters
  55. Step-up MC transformer for Audio Research SP 6C
  56. Psud help.
  57. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  58. Repurposing heathkit s-2 electronic switch
  59. output cap bypass?
  60. 6e5p & 6c41 tube amplifier
  61. Looking for my first tube amp...
  62. Acceptable variance in plate voltage?
  63. SRPP bias calculation
  64. 6A3 test, what am I doing wrong?
  65. Goldline Phono Tube Pre Amp PCB - Analog Metric
  66. New Copper Nanoparticle Solder - Breakthrough?
  67. SRPP as a final stage? What do you think?
  68. Troughline Transmissionline theory explanation needed
  69. Help with odd bias method on Crown tube amp
  70. preamp output impedance matching
  71. KT66 Woes
  72. Cascode driver
  73. 2a3 DC coupled
  74. ECF/PCF 200, 201 B10B 10Pin Tubes
  75. Homemade EL84 Push-Pull amp doesn't work
  76. Tamradio Transformer
  77. Variable HF oscilator
  78. eico st70 dimming house lights and slowing turntable`
  79. Amplifier Calculators
  80. Are any of these tubes useful for audio
  81. Modifying a J Sound Lab 2A3 amplifier
  82. Experimentation - Power transformer as output
  83. Mullard with ECC99 Phase Splitter
  84. Killed an Edcor OPT. How?
  85. If it ain't broke....
  86. Silly DHT question VaMax
  87. Recommendations for preamps with PCC88
  88. 6h23n same as 6n23p
  89. Mighty Midget Amplifier and speaker requirements.
  90. Bias Supply protection
  91. Tube Amp Schematics
  92. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  93. 6sn7 driving Push Pull Parallel kt88's?
  94. help with an old Peak ST-100 - single ended 6GW8
  95. Designing an 801 SET Class A2 Amp
  96. Grid choke considerations for 300b
  97. SE poweramp with best bass performance
  98. 45 Tube IN SET Amp
  99. what will happen?
  100. ECL86 PP Amp - Very low frequency clicking
  101. motor run cap question
  102. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  103. EL34 SET With No Driver Tube?
  104. Filter capacitors - motor run?
  105. Microwave transformers
  106. Capacitors in the cathode of preamp tubes
  107. How Many Tubes to a Rackspace?
  108. selenium diodes
  109. Is it possible to Oversize an SE OPT?
  110. questions about my ecc83 phono pre build
  111. PSU resistor temperature
  112. QE08-200
  113. Adding heater transformer to my 6b4g amp. help a noob please.
  114. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  115. Big Cap in luxman MB3045
  116. Question about 4x12 cabinet wiring
  117. What happened to Sakuma-san's website ?
  118. Should I ???
  119. Can you classify condition of tubes?
  120. ecc99 preamp into an amp
  121. AI 500 Volume pot advice wanted.
  122. eico st70 input impedance question
  123. Tube Preamp or Power Amp?
  124. pmillett "Engineer's Amplifier" to mono?
  125. Advice/schematics wanted for HF-81 opt project
  126. valve upgrade
  127. has anyone known about Ming Da amplifiers
  128. A nice little valve amplifier
  129. Use rectifier winding for 6.3V DC heater?
  130. Voltage Regulators Zener / Gas Reg
  131. Looking for first tube amp kit.
  132. UK input voltage question
  133. 1sh29b
  134. 6G2 amp - volume and tone play up on one input only
  135. One channel grainy sound
  136. anybody know 6BY5 plate resistance ?
  137. SE 6550
  138. Yaqin MC-100b Volume pot
  139. Pair of possible MC step ups - octal mount
  140. My Mighty Midget
  141. Conrad Johnson MV75 "update circuit drawing"
  142. Cheap Red LED bias on ecc83/12ax7
  143. stoneAmp
  144. Project thread: KT88 PP amp
  145. I need the voltages or schematic for a Magnavox 177.55 amp
  146. Different PSE output designs - which to use?
  147. Toroidal (adding a winding)
  148. Kondo Souga - audition
  149. a incar tube/valve line driver
  150. Before I punch the holes.. A quartet of EL84?
  151. Tubes Home Theater 4+1
  152. DAC direct out, not enough gain, help me build a driving stage.
  153. ultra linear aikido with linearizing pentode
  154. Scott 299
  155. OPTs With Multiple Secondaries
  156. Over Four Tons Of Tubes
  157. L channel lower output?
  158. 16LS Amp by S5 Electronics Questions
  159. Heathkit WM-5
  160. 6BL8 not on roll chart
  161. CJ PV-5 PS rebuild
  162. Attenuator for passive pre (LEAK ST 20)
  163. Help ID tubes Plz
  164. Data sheet and load line question
  165. Trouble with Silver to Black face twin mod.
  166. Grommes S35 booster amp output?
  167. dc filament heater - high impedance const. voltage
  168. Schematic for Modwright SWL 9.0se Preamp
  169. GZ37 substitutes
  170. output attenuation
  171. My humming home made tube amp
  172. Shared Cathodes 300b
  173. Bogen CHB-35 for Music...
  174. correctly connecting PT for 110/220 volts
  175. voltage divider
  176. "Bypass caps" and their effect on perceived sound
  177. Repair of Cayin HA-2 Tube Headphone Amp
  178. Best Drive for EL34
  179. Needing Schematic for Grommes LJ7 please.
  180. 6550C v. KT88
  181. ECC81 MU-Follower consumption
  182. Locating hum source
  183. c3g self oscillation problem - a newbie needs help!
  184. Voice of music console help
  185. One tube radio
  186. Triodes with better "look&feel"
  187. HV Supply
  188. Will this arrangement impact the input impedence of the cathode follower?
  189. Measuring preamp output impedance
  190. Capacitor from 120VAC to ground
  191. I have power but no sound???
  192. Using a function generator with a tube amp?
  193. What resistors to use on KT88s tubes?
  194. Opinions on Raysonic sp-200 + Raysonic 168 CD
  195. Lab power supply for testing tubes
  196. Could really use some help here!
  197. Help~ GU50 ?
  198. Some Power Supply Help
  199. newbies beware of lampizator srpp pdf
  200. Headphone output
  201. Has anyone played around with this as an amp front end?
  202. Help for Dynavox VR-70E
  203. Heathkit TT-1 (testing a 199, 99 tube)
  204. Tube And Transformer I/V Converter For Differential Current DAC
  205. Volume increases as amp warms up
  206. New 6V6 Build - Suggestions Needed
  207. Tubes Numbers
  208. VTL
  209. Visit to KR audio Prague 20120921
  210. Where did he posted it?
  211. Problems with PT325.2i
  212. What phono preamp with Dynaco MKIII
  213. opinions on supporting a past sale/trade deal
  214. Series connection of regulator tubes
  215. Preamp buzzes when volume is at zero?
  216. Hrrrrmphhhff. PSU design error and how to cope with it
  217. 300B fixed bias specs
  218. Battery filament for 4P1L
  219. Need pro help with this tube amp.
  220. Need help with UTC transformer
  221. Very interesting 300b design
  222. How to understand the power output in this case?
  223. K12G Help
  224. all dht se PX4
  225. multiple output transformers per channel
  226. What would you change in this schematic? (PP amp)
  227. Anyone know where to get this type of breadboard?
  228. moscode 600 tube recommendations
  229. Should I use two separate OPTs for parallel output tubes?
  230. custom Tube chassis vendor
  231. VLS631 Thermal Delay
  232. 6au6 preamp stage
  233. Recognize this tubes...
  234. need help for my new amp: 6G6G driver & 807 SE
  235. Anyone heard of radiometal for transformer core?
  236. BCF-2
  237. Glowing Plates of Doom
  238. Modding Aikido to non-Aikido such as SRPP?
  239. DN2540 plate load.
  240. Help! Did my power cable blow his tubes?
  241. 211 amp SRPP driver
  242. tube to replace opamps in cd player
  243. Jolida 302b started to crack/pop once a minute
  244. why it doesn't work - 300B SE power amp
  245. Trio KW-70 schematic also known as WX-400 under kenwood name
  246. New DC to AC to high voltage AC idea?
  247. LED bias for 6N1P driver
  248. DIY tube amp general inquiry
  249. 6as7 Aikido headphone amplifier
  250. Cold tubes in warm amp = smoke?

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